Ejecting mechanism



Feb. 5, 1952 w. s. SUTOWSKI EJECTING MECHANISM 2 SHEETSSHEET 1 Filed Nov. 21, 1947 Q Q m B mm m w k mm 0. NM: h R M E H- mm mm R INVENTOR.

WALTER S SUTOWSK/ Feb. 5, 1952 w. s. SUTOWSKI 2,584,153

EJECTING MECHANISM Filed NOV. 21, 1947 2-SHEETSSHEET 2 Tea; 36"

IN VEN TOR. WALTER S. SUTOWSK/ Patented Feb. 5, 1952 UNITED STATES EJ ECTIN G MECHANISM Application November 21, 1947, Serial No. 178L295 15 Claims. 1

My invention relates to ejecting apparatus for a-press wherein stampmgs are ejected from a die assembly upon rformi-ngrof the stamping tby the punch :of the press cooperating :with the die assembly.

An object :of :my invention :is to :provide :an ejecting mechanism operating in a .manner to permit itheispeeding :up :f :the operation of the punch press to a rate-{tar exceeding the rate of operation heretoforerobtainable.

Another object :is the provision of .an improved ejecting mechanism so :adapted to the operating characteristics of a punch press that the emciency and speed of the 'punch press may be greatly increased over that .of punch :presses without 'my ejecting mechanism.

"Another .lObjBCt :is :the :provision :in :an ejecting mechanism of a push-out device mounted in a "floating condition-and which :is moved in one direction by theforward movement of1the press punch'and is movedin an oppositedirectioniupon rearwardlmovement of thepress' punch.

:Another :object :is the provision :in an :eiector mechanism of a rigid and .positive connection between #thezpress punchcand the push-out :device for :moving the ipu-sh-out device :away from the punch before the punchfl'moves into .the die "openinc.

Another obj ecit :is the :provision :of ..a combination of levers and resilient :means for-operating a punch press ejector in :a :new'and bettermanner ;to give heretofore unobtainable and unknown results in the operationiof the-press.

Another .object is :the vprovision of an ejector mechanism wherein the push-out device doesmot bear "the strain .or thrust of the *iorwardymovement of the plunger .or ram ,an'dathe Plunger-or ram does not meet any substantial resistance :by the push -out device.

Another object is the provision for a .novel combination :Iin an ejector :mechanism wherein the eiectmentpf the;stampingsiis properly timed or :synchronized with the operation of the press plunger :to aobtain the greatest efficiency in iej ectment: and .inthe operation of :thewpress.

' -'An0ther :objectis for actuating a push-out device:by resilient means COIltIOlIBdfitiIDBdflilld energizedxby :the driving :means of the press.

Another object is 'ithe :provision for the ejectment .of stampings by utilization-pf energy stored intresilient means, athe energy being-imparted to the resilientmeans by thefforward movementpof V the :press :plunger, rtheatransfer of :energy from the 'press "plunger to :the :resilient means :being divertedxiromztheidiesassemblyiandxpushvout .de-

viceby provi on of ener ytremiermm aenternally of the die assembly and g ushw u d vi e- Another object is the provision :Of a un que arrangement of pivoted levers and :a ,resilient -member for the operation of a push-out device whi h ike chara te eferences ;.i.nd eate like pa t and in whic .w

ifi'i reilis. endview bodyin my m ia sm looking a the e -a ead ndtof th presssh Wnin Fieune n:t e di e tionpfathe-arrovvs l.-.-l

iEigure2 is we side .view of ya ;-punc.h cares tembodyi myzinvention andshow e portion of the press in section {to illustrate the arran ement-p: the parts, the. section (b ing .xtake 'al ng the .lin 2-2 of Figure 1. The view v 0f Eigure shows the rec p oca n ,-.n u g. th :press a d the eiecto flmeehamsm inits w thdrawn QIYlZfiQRWflJd position;

' Figure ;3 is ;a view .isimilar 1 3,0 :thatef F siu'e but shows thep ess pmnserandeie tih nism *in the other of their .extrem positiQM c is,; inythepunch naorgiorward po tion;

.zFigure -;4:is an enlarged sect onal iv ewzeheviine the detailed arrangement-pf thee charlie ast sembly zand pnsh-Qntdev e. meu si- -bni he press shown in Eigure l, '..2 .:an l3 Fi ure f5 :shows :5 zporticn 10f the wiewzshow tin Ei ureA and illu trates Etherea zit peratin position :irom z hattshown '1 and zF'ignre 16:18 'awiew similar to-gthat gofszl'rlieure -5 and :illustrates athe .Eparts in .still --an othej operating :position. :CEhe rviewslof' figures-L4, g5 and @6 illustrate :the :various positions of the :1 punchy die assembly, :push out device and :means afar one! ating :the ;push=o ut device {in various positions during bhBa-OpeIZatiIIg: cyclepfrthezpres The press :illustrated in athe drawings ;ist0f the horizontal type-but itiis understood that :mydnvention is equally applicable ito=- .vertically,-disposed:presseszandpthenpresseseasvwell. ;.Eor:pur poses of avrefzerenceains the descriptionzandacl-aims, the 5left-hand.:,end1 of ethe press .vshown J'Figures 2 and :=3 is *the sfonwardlend, rand movementstoy ward thisxleftehand end; is-meierred teas-forward- =o. munc "12 95526 1 3 movement and punching movement. The righthand end of the press shown in Figures 2 and 3 is referred to as the rearward end; and movement of the parts toward this end is referred to as a rearward movement and withdrawing movement.

The press proper and without my ejecting mechanism is of the usual and standard type, except for such modifications as is necessary for the mounting and assembly of my ejecting mechanism and parts to the press. A frame I2 is carried by a base II in the usual manner.- A flywheel l3 journalled on the frame |2 is driven by a motor |4 through a belt l5. Bya usual cam and crankshaft arrangement; the flywheel |3 re:- ciprocally drives a plunger or ram IS on guideways carried by frame H. A punch mounting arrangement assembly denoted generally by the reference character I1 is mounted on the end of the plunger It, a suitable center post 24 of the assembly being positioned in the head of the plunger IS. A punch l8 carried by the assembly extends out and forwardly of the plunger I6 andis carried by the plunger IE to reciprocate therewith.

A die-support portion 39 of the frame I2 is arranged transversely of the line of movement of the reciprocating plunger. The portion 38 of frame |2 carries a bolster plate 39 secured thereto. A die assembly denoted generally by the reference character 2'! is carried by, and secured to, the 'bloster plate 39.

A pivot mounting or hinge 39 is secured to, and carried by, the portion 39 at the forward end of the press; that is, on the side of the portion 38 opposite of the die assembly. A lever arm 49 is pivota lly carried by the pivot mounting 39. The

lever 'arm 49 extends downwardly and approximately transversely of the line of movement of the reciprocating plunger. The arrangement of the lever arm'49 onthe pivot mounting 39 is such that the lever arm swings n the pivot forwardly and rearwardly, that is, to the left and to the rig-ht in the views of Figures 2 and 3. The lower end-of the lever arm- 49, that is, at the end farthes'tremoved from the pivot mounting 39, there is a niche or cutaway portion 52. -A rod disposed in a direction longitudinal of the press is disposed in this niche 52. One end of the rod 5| is 'carried by, and secured to, the press frame |2 by asuitable support bracket 50. The fit of the rod 5| in niche 52 provided inlever arm 49 is such-that the lever arm 49 may freely swing back and forth-relative to the fixed rod 5 I At the forward end of the rod 5|. there is provided a resilient member consisting of a block of resilient rubber 53. This rubber block 53 is capabl e of compression to receive and store energy therein, and is-capable of expansion to release the stored energy to adjacent parts. 'Washers or 'apertur'ed plates 54. and 55 are mounted'on ro'd:'5| anddispo'sed on opposite sides ofthe rubber block 53. The washer 55 has a loose fit onred 5|' sothat the washer 55 may move'along the rod 5| uponexpansion and compression of the rubber'block 53. A nut on the forward end of rod 5| secures the plate 54 to rod 5| and limits forward movement of block 53 so that forward movementof plate 55 on rod 5| causes compression of the rubber block 53.

Another lever arm 4| is pivotally carried by pivot mounting 42 secured to, and carried by, the

frame I2 as indicated in the-drawing. The disposition ofthe lever arm 4| and pivot mount ing-.42 such that. lever. arm 4|...may swing for-..

wardly and rearwardly relative to the longitudinal dimension of the press. At the free or moving end of the lever arm 4|, there is an elongated head 43 which is disposed in a recess 44 provided in the reciprocating plunger I6. Shock pads of rubber, fiber or other suitable material are provided on the ends of the head 43 as indicated in the drawings. A suitable open space is provided in the ribs and crosspieces of the frame i2 to permit the swinging of lever arm 4| between its two limits of movement. Another shock pad of rubber or fiber is provided on the side of the lever arm 4| to absorb shock in the lever swinging back to its rearward position and striking the stop provided by the web of the frame |2 as shown in the drawings. The disposition of the lever arm 4|, pivot mounting 42 and elongated head 43 relative to the frame and to the reciprocating plunger is such that the lever arm 4| is swung forwardly and rearwardly on its pivot as the plunger is reciprocated. The arm 4| is swung forwardly upon forward movement of the reciprocating plunger, and rearwardly upon rearward movement of the plunger by the carrying of the head 43 in recess 44 of plunger l3.

Carried by, and secured to, the lever arm intermediate its ends is a socket member 45. Socket member 45 may be secured to the arm 4| by welding it thereto or. any other suitable means.

In the embodiment illustrated. the socket 45 is located about two-thirds of the length of arm 4| from the pivot mounting 42. As arm 4| swings back and forth, the socket 45 is carried therewith. The forward end of the socket member 45 has a recess or dwell, the sides of the recess be-,.

in a cross-web of frame l2 accommodates the rod 46 to permit the rod 46 to reciprocate through opening 41 in a. slide fit. The rod 43 is so dis posed as to float unconnected with other parts of the device and to be moved forwardly and backwardly between its two limits of movement, that is, between the positions shown in Figure 2 and Figure 3. An adjusting screw bolt 48 is threadably engaged in the arm 49. The inner or rearward end of the adjusting bolt 48 abuts against.

the forward end of rod 46, the rod 43 and adjusting bolt 48 being in alignment. The rod" 46 is not connected to the bolt 48 and they engage each'other by one being pushed against the other through external forces; A suitable lock nut on bolt 48 holds the bolt 43 in'the position to which it has been adjusted. The adjust ing bolt 48 reciprocates with the swinging of the arm 49.

Intermediate the ends of the arm 49 and nearest to the pivot 39 there is a spacer block 34:

which is carried by, and secured to, the lever arm 49. The block 34 may be secured to the arm 49 by bolts, welding or other suitable means. The spacer block 34 swings with the arm 49 on the pivot mounting 39.

to blocks 34 and 32 is such that as the lever' arm 49. swingsin an arc onthe pivotmounting A link member 33 is connected to the rear end of the block in such t9, the block iaz r rs moved back and ioiith ma straight-dine coincidingw lt'h the axis of the reciproca'ting plunger if-6. A hardened steel plate bearing supports in portion 38 -"of the h'anie accommodate the block 32 to support and guidethe same in its reciprocating motion. The link 33 provides a hing'e whereby i the swinging motion of block 34 is "translated into i'eci s'irocati rig motionci bioekez. t

Bo-ltedormtIIerWEe SeGured tOthe bolster pl'alte 50 is the die shoe 29. Bo'l ted o'r othehwise secured tothe die shoe zsand bol'ster platen is the die assembly 121. The the assembl 21 has ail-openspace 2-8 provided therein.

- l he die assembly 2 is :crmstructed in accord ance with the shape of :the stampi'n'g to be fabricat'ed. In the illustration shown, the die assembly is formed tor the stampin o'f metal washers, that is, d-iscs with'an opening through the center. To term the opening in the center of the washer, a piercer 31, of general ,eylindrical s'h'ape and #solid throughout, is positioned in the die assem-bly centrally -'of the dieopening. The :piercer has its inner end abutting upon -the die 'shoe ZS.

lhedetaimd arrangementlof the punch assembly ll is shown Figure '4. A block I 9 having the center ost is carried by, and secured to, the plunger 16. "The block 'orlpunch holder [9 has a hard plate 20 attached-thereto 'an'da bloc-k or punch pad Z'I "secured to the hard plate 21).

The punch proper 1-8 is secured "in a suitable opening in the punch 1 pad -21 The I punch assemblyconsisting of punch holder [9,"hard-plate 26, punch pad 2 l, center post M and punch l 8, comprises a unit which reciprocates with the-plunger t6. To provide for accommodating slugs 'cut from the=cehteropening of the washers *by the piercer 31,-along-itudiha1 opening 23 is provided in punch l8,-and opening"23 registers with tin-opening 2 2 in the punch holder [9. The slugs are drawn oh through the opening 23 and opening 22' by pneumatic means or-other suitable means. shown in the drawings, -*an appropriate strip "of sheet metal 2 5 isimoved al'on'g across the die asse'n'ibly 21 by automatic or other means to consecutively bring unpu'hhed sheet -ihaterial over the dle opening where a washer :56 is punched down-int'o the dieo'penin'g bythe-punch l8. "The punch l8, -in stamping out the Washer 56 irom the-strip or sheet m'etal Z5, pushes the washer 55 down into the die opening, 'a s shown in F igure Upon withdrawal or "backward movement =of the A reciprocating punch 18, the sheet material 25 is moved along read-y for the punching of another washer.

I-o remo'v e 'the punched washer '56 or other stamping from the die assembly, the push-out ring 35 'is positioned :in the die opening anh su'rrouhd-ifig th'e pierc'er 31. "The -push-ou't ring 35 has a flange portion'w hich is accommodated by the transverse opening :28, the accommodation oi theflange of "the push-out ring in the opening 28 being such that the push-hut ring may move forwardly and backwa'rdly in the die op'ening' between Elimits. To press the -push-outriil'g rearwardly, a plurality of push-out pins "36 extend through the die shoe -29 and into th'e lower part of the die -assembl y 21 to abut against' the inner end of the push-but riifg 35, that is, against the flange or the pushmutrin'g F35. :The fit :of 'the push-out pins 36 lea sliding engagement in the die shoe :29 and (the base of the die asse'mbly 27, so that the push 'o'ut pins 36 may freely reclp'rocate therein. It is preferred thatthereare three push-out pins :36 spaced equidistantly a'round the annular extent of the push-out rin'g '35, so that movement of all three :pins 1'36 against the pushout ring :35 moves the push 'out ring 35 in -a straight line and without cocking infthe dieiopening. -It is thus 'seen that upon movement of the push-out "pins rearwardly toward the shee't material 25, the pins move the push-"out ring 'r'earwardlyin 'the die assemblys'and the push-'outring in turn ej ect's 'the formed washer :55 from the-die opening. -:A transverse blasterairer other :suitable means :acro'ss the mouth of the die opening removes the ejected washer :and carries -it away from thedie, or in theih'oriz'ontally disposed Lpres's illustrated gravity causes the formed washer to drop after ejectment from the die opening by the pushout:ring 35. :It is also'to be noted that upon forward movement of the punch into the opening of the die assembly during the stamping of a washer 56, the push-out ring 35 --is moved iorwardlyaway from the sheet material'25. This movement of the =push out ring 35 in turn' push'es the three push-out pins :35 forwardly through their-respective openings in "the die and die shoe.

stripper 26 may be positioned around the punch l-8 to restrain the-sheet metal 2? 'during the withdrawing :or rearward movement of the punch in its stamping cycle.

'The hard plate 3| mounted on the block 32 abuts against the for-wand 'end of the push-out pins 36, that at the end of the pins "opposite from the push-out ring 35. Upon movement of the block 32 toward the sheet material 2E5, the

push-out pins are moved' by thehard plate 3'! to move thepush-out ring-sdreartvardly towar'dth-e sheet -material 25, and thuseject the Washer 55. Upon forward movement '-of the block '32 away from the sheet material 25, the hard plate'tl is moved away from the push-out ring 35. the pins 36 and ring 35 may move freely or float, then' the removal'of the block-32 and plate-3 I from the pins 36 and forward movement of the punch F8 against the washer5'8 and ring fifi'moves the ring '35 andpins '33 forwardly away from the sheet 'materia1 25. It isto be 'noted'that the punch 1'8 only -hasto overcome the slight friction of the ring "35 and pins 36 to move them forwardly during the forward or punching operation of the punch upon withdrawal or forward movement of the block 32 and plate 3| away'from the sheet material 25. In-o'ther words, there is substantially no resistance to the forward movement of the push-out device consisting of the push-out ring and push-out pins -'during the forward or stamping movement of the punch, as the ring" and pins *fioat and the backing of the plate 3| on the block 32 is r'emove'dto the position 'shown inFigure 4.

In operation ofth'e press, "the plunger l6 moves forwardly or't'othe left'in the'viewsof Figures 2 and '3, thus 'forcing the punch l8 through the sheet metal 25 to form the metal washer 56 in the-die. Atthis point in the cycle, the parts are in the position shown in Figures '8 and-4. As the p'lunger or ram I'B moves forwardly, to theleft-of the "views shown in Figures 2 and 3, lever armil also moves-forwardly or to the left, 'pi-v'oting on pivot mounting '42. The arm *4! is moved by the engagement oi the elongated head 4 3 "by the wall of the recess flin the plunger 'The lever arm; 4| carrying the socket 45. pushes rod 46 forwardly or to the left. The rod 46 pressing against the adjusting bolt 48 swings the lever arm 49 forwardly, to the left, as shown in Figures 2 and 3, on the pivot mounting 39. The movement and the timing of the arm 49 is adjusted by the adjusting bolt 48 so that movement .of arm 49.

may be made relative tothe movement of the arm 4|, and a greater or lesser amount of play may be provided between the ends of rod 45 and lever 4| at one end and bolt 48 at the other end. ,Forward movement of lever arm 49 presses against the plate 55 on rubber block 53 and compresses the rubber block 53 and thereby imparts energy thereto. Forward movement of lever arm 49 to the position shown in Figures 3 and 4 carries the block 32 and plate 3| thereon forwardly,.that is to theleft, by the link 33 and block 34, mechanically and positively pulling the plate 3| forwardly away from the sheet material 25 and removing all resistance to the push-out pins 35. This forward movement of the parts 3|, 32, 33 and 34 by the leftward swing of lever arm 49, permits the push-out pins 35 and push-out ring 35 to move freely in the die assembly when the punch I8 is pushed into the die opening of die assembly 21.

.When plunger IS in its reciprocating cycle, moves back to the open position shown in Figure 2, the punch assembly H and punch 18 move with it. Lever arm 4! is moved rearwardly on its pivot mounting 42 upon this withdrawing or rearward movement of the plunger I6 to the position shown in Figure '2. Upon removal of the forward thrust on the rod 45 by the lever arm 4| and socket 45, the rubber block 53 is permitted to expand. The expansion of the rubber block releases the energy stored in it, and the plate 55 on block 53 forces the lever arm 49 to swing rearwardly, that is to the right as shown in Figure 2, to the position shown in Figure 2. This rearward movement of lever arm 49 causes the adjusting bolt 48 to move the rod 46 back to its position shown in Figure 2 where it is ready for another forward thrust by the socket 45 on lever arm 4 I.

The rearward swinging of the lever arm 49 by the force of the expanding rubber block 53 moves parts 34', 33, 32 and 3| rearwardly or to the right, and thus to the position shown in Figure 2 and in Figure 5. The energy in the rubber block thus forces the hard plate 35 against the end of the push-out pins 36, which in turn push the push-out ring 35 rearwardly in the die assembly toward thesheet material 25 and thereby eject the formed washer from the die assembly.

The ejected washer or other stamping then falls clear of the press by gravity or may be removed by other means and the same cycle here described is repeated during the continuous reciprocation of the plunger Hi.

In Figure the washer has the sheet material moved ready for the stamping of another washer. At this moment the pushout ring 35 and push-out pins 36 are in the position where they were left by the last rearward action of the hard plate 3!, that is, the pushout ring 35 is next adjacent to the sheet material 25. The washer or other stamping has just been ejected and the sheet material 25 has moved along transversely of the die ready for another stamping operation. In this particular movement, the hard plate 3| is against the push-out pins 36 and is ready to withdraw from the pushout pins before the punch l8 reaches the sheet material to stamp out a washer.

been ejected and In Figure 6, it is shown that as the punch,

l8 reaches the sheet material 25 and before the punch enters the die opening, the hard plate 3| carried by member 32 has anticipated this move 3 and moved forwardly, that is, away from the sheet material 25. Thus, as the punch l8 commences to meet the resistance of the sheet mate- .rial in the stamping operation, all resistance to thepush-out ring and push-out pins is eliminated by the movement of the hard plate 3| and member 32 to the position of Figure 6, which is also the position of Figure 3, wherein the lever arm 49 has swung forwardly or to the left in Figure 3. The arangement of the leverson their pivots, the spacing of the rod 46 from the pivots of the levers, and the spacing of the block 34 on the lever arm .49 from its pivot is such that the force of the block 32 and plate 3| is always withdrawn before the punch enters the punch assembly and there is substantially no resistance offered to the punch by the push-out device. The same arrangement is such that there is a proper and proportionate movement of the push-out device to eject the formed washers immediately after the withdrawal of the punch l8 from the opening of the die assembly. The arrangement provides for the timing of the ejectment so that the washer is ejected immediately following the withdrawal of the punch and before the punch reaches its farthest limit before coming forward again. Thus, the way is clear and the washer is completely out of the way long before the punch starts forward on its next punching operation. The arrangement provides for this very fast ejectment immediately following the withdrawal of the punch from the die and permits the press to be greatly speeded up over that possible with all other arrangements. Also, with the present arrangement here described, the ejected washer is not carried out of the die assembly with the punch and at the same rate, the lever and resilient system provided here making for a slight lag in time between the withdrawal of the punch from the die and the ejecting movement of the push-out device. This slight lag permits the washer to be ejected and moved sideward by gravity or other means in a manner possible and much faster than obtainable when a washer is moved out bodily withthe punch and in constant engagement with the end of the punch during the Withdrawal movement of the punch. The leverage system and the resilient means permits for the ejectment of the stamped washers at just sucha proper time during the stamping operations of the press that presses equipped with my device are able to operate much faster and more efficiently than by that obtainable with other ejecting systems. While the illustration in the drawings shows thestamping of a washer, it is ofbe modified, all as will .be suggested from the disclosure here made. These variations and modifications embody the inventive concept heredisclosed within the scope of my invention as defined by the terms, of the patentclaimaj Although my invention has been described in its preferred form with a certain degree of particularity, it is understood that'the present disclosure of the preferred form has been. made only. by way of example and'that numerous changesinthe details of constructiqnandthe combination.

91, and arrangement; of parts may be resorted o .without'departing from the spirit and the scope of the invention ashereinafter-claimed.

What is'claimed is: 1. In a punch pressihavinga frame, areciprocable ram, a die assembly carriedby the frame,

. and a push-out device for" ejecting stampings from said die assembly, said, push-out device being movable forward into the die" assembly upon forward stamping. movement of said ram, apparatus for operating said push-out device comprising in. combination av first lever pivota-Ily carried by said frame and being engageab-le by said ram to be moved; thereby upon forward stamping movement of said, ram, a second lever pivotally carried by said frame, an engaging member carried by said second lever'and movable therewith, said engaging member being posi timed to engage and move said push-out: device upon, rearward movement of said second lever, a motion-transmitting member arranged to transmit motion from said first lever to said, second lever upon forward movement of said ram, and a resilient member anchored to said frame and operatively engaging said second lever at a position along said second lever spaced from the fulcrum thereof and from said engaging member to provide for fractional movement of the engaging member relative to movement of the lever atsaid position, said resilient; member being arranged relative to said secon lever and directed to absorb energy upon forward movement of said ram and by said energy to move said second lever at said engaging member rearwardly upon rearward movement of said ram, the arrangement of said first lever, motion-transmitting member, second lever, resilient member and engaging member being such that upon forward movement of the ram the engaging member is moved forwardly away from said push-out device and energy is absorbed by said resilient member and upon rearward movement of the ram the engagingmember is moved rearwardly against said push-out device to move the same for ejectment of'a stamping from said die assembly.

2; A mechanism for operating a push-out device for ejecting stampings from the die mounted on a punch press, said press having a ram and a frame, said ram being reciprocal to advance toward, and to withdraw from, said die and said push-out device being reciprocal to retract, and to extend, relative to said die, said mechanism comprising in combination, resilient means adapted to receive and release energy, first operating means operatively connected to said ram and said resilient means for recurrently imparting energy to said resilient means upon advancing movement of said ram toward said die andrecurrently releasing energy from said resilient, means upon withdrawing motion from 'said' die, and second operating means connecting said resilient means and said push-out device to recurrently extend 'sald push-out device upon the release of energy by said resilient means, said operating means ineluding motion-dividing means to provide for an extending movement of said push-out device less than, and at a rate proportionate to, the withdrawing movement of'sai'd ram.

3. Ina press having a frame; a reciprocable plunger carried by said frame, adrivingmember mounted on said frame for reciprocating said plunger, a die support carried by' said frame, and a reciprocable push-out device carried by said die support for successively pushing stampingsout of a die carried bysaid die support, said; plunger being, movable in a first direction toward said die support and said push-out device being movable in, an opposite direction, a mechanism for operating said push-out device comprising in combination a lever pivotally mounted to said frame, engaging means carried by said lever at a first distance from the lever pivot, said engaging means being positioned to engage said push-out device and to move the same in said opposite direction upon movement of said lever in. said opposite di rection, power-take-off means driven by said driving member, said power-take-ofi' means operatively engaging said'lever at a distance from said lever pivot and adapted to move said lever in said first direction upon movement. of said driving member-insaid first direction, andpower-reservoir means operatively connected to said lever at a distance from said lever pivot and from; said engaging means and arranged relative to said lever so as to receive, energy upon movement-of said lever insaid firstdirection by said powertake-off means and by saidenergy to move said lever in said opposite direction independently of, and unopposed by, the forwardly directed force of said power-takeoffmeans, the said distances from the lever pivot being proportioned to pro vide for a movementof the engagingmeansby the lever in said opposite direction slower than, and

at a rate proportionate to, the movement ofthe driving member in said; opposite direction;

4. In an ejecting mechanism for a punch, press raving a frame, a reciprocable. plunger and a push-out device for successively pushing out stampings from the dieupon withdrawing motion of the plunger, comprising in combination a move able member, pivot means carried by said: frame and pivotally supporting said movable member, engaging means connected to said movable member ata distance from said pivot means and adapted to engage said push-out device, operating means synchronized to move inunison with said. ram, said operating means being are ranged to operatively engagesaid movable meme her at a distance from said engaging, means to move the movable member forwardly upon forward movement of said ram, and resilientmeans carried by said-frame and operatively engaging said movable member at a distance fromsaid engaging means, said resilient means being directed to move said movable member rearwardly upon rearward motion of said operating means, the spacing of said engaging means, operating means andsaid resilient means along said movable member from saidpivot mean-sproviding for a relatively lesser-movement of saidpush-out device by said engaging means in respect to the movements of said operating means and resilient means.

5. A mechanism for ejectment of; stampings from the dieof a press, said press having a frame and a plunger sequentially movable forwardly toward said die and movable rearwardly'fromsaid die, said press also having a reciprocable pushout device for pushing stampings out ofsaid die upon rearward motion of said plunger, said ram and die being disposed on a reference line coinciding with the path of, and the axis of, movement of said plunger, com-prising in combination a lever, pivot means carried bysaid frame and pivotally' mounting said lever at a lateral dism f d: ref ren l e to prov de f r forward and rearw rd movem n f: said lever 1 aei e means; carr ed by aid le r at a d tance from said pivot, means and positioned toppera; yn a e sa d. p sh-ou devi e adjacen aid reference line upon rearward; movement of said lever to operate said push-out device and to disengage said push-out device upon forward movement of said lever, operating means carried by said frame and operatively connected to said plunger to move forwardly upon forward movement of said plunger, said operating means being positioned to operatively engage said lever at a lateral distance from said reference line and from said pivot means to move said lever at said reference line forwardly upon forward movement of said ram, and resilient means carried by said frame and operatively engaging said lever at a lateral distance from said reference line and from said pivot means and directed to move said lever at said reference line rearwardly upon termination of said forward motion of said operating means, the rearward movement of said lever by said resilient means being independent of, and unopposed by, the forward movement of said lever by said operating means, the disposition of said operating means and resilient means relative to said pivot means and the proportion of the lateral spacing of said pivot means, operating means and resilient means, respectively, from said reference line producing a rearward movement of the engaging means at said reference line which is slower in rate and less in distance than the rear-, ward movement of said plunger at said reference line.

6. In a press having a frame, a reciprocable plunger carried by the frame, a driving member synchronized to operate in unison with the reciprocations of said plunger, a die support for carrying adie, and a reciprocable ejector by the die support for ejecting stampings from said die, a mechanism comprising in combination engaging means positioned in the line of movement of said ejector and movable to engage and move said ejector in a first direction to engage and move said ejector toward said plunger, lever means operatively engaging said driving member and said engaging means and arranged to move said engaging means in a second direction away from said plunger to permit said ejector to freely move away from said plunger upon forward stamping movement of the plunger, and resilient means peratively engaging said lever means at a point laterally distant from said engaging means, said resilient means being arranged and directed to be moved by said lever means upon movement of said driving member in said second direction and to move said lever means upon movement of said driving member in said first direction, the movement of said lever means by said resilient means moving said engaging means in said first direction in a motion proportioned to, and less than, the motion of said lever means at said point.

7. In a press having a frame, a ram plunger reciprocable longitudinally of said press and carried by the frame, a die support carried by the frame, and a push-out device carried by the die support for pushing stampings from the die, comprising in combination a first lever having one end pivotally carried by said frame and having a second end operatively engaged by said plunger to reciprocate upon reciprocation of said plunger, a second lever having one end pivotally carried by said frame and having asecond end movable 1ongitudinally of said press, a reciprocable rod disposed longitudinally of the press and having a first end operatively engageable by said first lever to be moved forwardly by said first lever upon forward movement of said plunger and having a second end operatively engageable by said second lever to move said second lever forwardly upon forward movement of said rod and to be moved rearwardly by said second lever upon rearward movement of said second lever, the arrangement of the rod and levers being such that force is transmitted in a forward direction only through said rod from said first lever to said second lever upon forward movement of said plunger, an engaging member carried by said second lever at a" first distance from the pivot of said second lever and positioned between said second lever and said push-out device, and a resilient member operatively engaging said second lever at a second distance from the pivot of said second lever and arranged and directed to be energized upon forward movement of said second lever and by said ener y to move said second lever rearwardly upon rearward movement of said first lever, said second distance being greater than said first distance, the forward movement of said second lever withdrawing the engaging member from said pushout device and the rearward movement of said second lever moving the engaging member against the push-out device'to move the push-out device rearwardly, the rearward movement of said push-out device to push out said stampings lagging the rearward movement of said second lever at said resilient member.

8. In a press having a frame, a reciprocal ram plunger, a punch carried by the plunger, and a die assembly having an open space therein, the combination of a push-out device positioned in said open space and freely reciprocal therein from ejecting position to stamping position, said pushout device being movable to said stamping position by said punch entering said die assembly, first means carried by the press and positioned to engage said push-out device, second means carried by the press and positioned to move said first means away from said push-out device, third means carried by the press and operatively movable in synchrony with said plunger to move said second means forwardly upon stamping movement of said plunger, and fourth means enga ing said second means, said fourth means including resilient means arranged in relation to said second means for absorbing energy upon movement of said second and third means during stamping movement of said plunger and imparting energy to said second means to move the same upon withdrawing movement of said plunger, said second means including lever means for making the movement of said first means proportionately less than the stamping and withdrawing movements of said plunger, the arrangement of said first, second, third and fourth means providing for the withdrawing of said first means from the push-out device upon stamping movement of said plunger to remove resistance to the movement of the push-out device to said stamping position and for the engagement of said pushout device and movement of the same to ejecting position by said first means upon withdrawing movement of said plunger, the movement of said first means to engage and move said push-out device to ejecting position lagging the withdrawing movement of said plunger.

9. In a press having a frame, a reciprocable ram plunger, a punch carried by the plunger, a

die assembly carried by the frame, said punch and die assembly forming a stamping upon em trance of said punch into the die assembly by stamping movement of said plunger, and a reciprocal push-out device carried by the die assem bly for ejectment of the formed stamping upon withdrawal of said punch from the die assem- 13 bly by said plunger, mechanism for operating said push-out device comprising in combination engaging means adapted to engage said push-out device and move the same for the ejectment of said stamping, positive means driven by said plunger for positively moving said engaging means forwardly away from said punch upon forward stamping movement of said plunger to substantially remove resistance to movement of said push-out device by said punch, resilient means for resiliently moving said engaging means into :engagement with said push-out device to move said push-out device to ejecting position, said 7 positive means and resilient means being connectedto provide energizing of said resilientmeans by said positive means during stamping movement of said plunger and for movement of the engaging means by the energized resilient means upon withdrawing movement of said plunger, and means operatively interconnecting said engaging means and said resilient means for reducing the movement of said engaging means relative to the movements of said plunger, to provide for a movement of the push-out device in ejecting formed 'stampings that is less than the withddawing movement of the punch from said die assembly. 7

10. In a press having a frame, a. reciprocable ram plunger, a punch carried by the plunger, a die assembly carried by the frame and cooperable with said punch to form a stamping, and a pushout device carried by, and reciprocable relative v g to, said die assembly for ejecting the formed stamping, the combination of a backing member positioned adjacent said push-out device and adapted to engage and move said push-out device to ejecting position upon rearward movement of said backing member toward said plunged, a lever system connecting said plunger and said backing member, said lever system providing for forward movement of said backing member upon forward movement of said plunger, a resilient member connected to said lever system, said resilient member being arranged to be energized by said lever system upon forward movement of said plunger and being adapted to move said backing member, through said lever system, rearwardly upon rearward movement of said plunger, the ratio of the movement of said backing membeer to the movement of said plunger being determined by said lever system, said lever system being arranged to provide a movement of said backing member less than the movement of said plunger, the rearward movement of said backing member moving the push-out device for ejectment of the formed stamping and the forward movement of said backing member removing resistance to the forward movement of said pushout device upon entering of the said punch in said die assembly.

11. In a press having a frame, a reciprocable plunger, a punch carried by the plunger,-and a die, the combination of a freely reciprocable pushout device carried by the die, an engaging member in alignment with, and positioned forwardly of, said push-out device, said engaging member being adapted to move against said push-out device and to move it rearwardly upon rearward movement of said engaging member, a positive means for moving the engaging member forward- 1y upon forward movement of the plunger, impositive means for moving the engaging device rearwardly upon rearward movement of the plunger, said impositive means being positioned to be energized by said positive means, said positive and impositive means being arranged to move in'paths parallel to, at a distance from, the line of movement of said plunger to provide for the removal of resistance to said punch in the die by said engaging member upon forward movement of the plunger,.and lever means interposed between said engaging member and said positive and impositive means to provide fora degree of movement of said engaging member different from the degree of movement of saidplunger, the differential of said movements being such that the ejecting movement of the push-out device is less than the withdrawing movement of the punch.

l 12. In a press having a frame, a reciprocable ram plunger, a punch carried by the plunger, a die, and a reciprocable push-out device associated with the die, the combination of an engaging member aligned with the push-out device to engage the same and more it to ejecting position after withdrawal of the punch from the die and to disengage the push-out device and tomove away from the same upon entrance of the punch into the die, a lever pivotally carried by the frame and carrying said engaging member, biasing means arranged for biasing said lever toward the push-out device to move the engaging member into engagement with the push-out device and to move the same toward ejecting position, and operating means driven by the plunger during forward travel of the plunger and arranged for recurrently overcoming the bias of said biasing means upon forward movement of said plunger, the spacing of said biasing means and operating means along said lever relative to its fulcrum and sad engaging member providing for a, movement of said engaging member less than the movement less than the movement of said biasing means and operating means.

13. In a press having a frame, a reciprocable plunger, a punch carried by the plunger, and a die, the combination of a freely reciprocable push-out device carried by the die, an engaging member in alignment with, and positioned forwardly of, said push -out device, said engaging member being adapted to move against said pushout device and to move it rearwardly upon rearward movement of said engaging member, positive means driven in synchrony with the plunger for moving the engaging member forwardly upon forward movement of the plunger, and resilient means arranged for moving said engaging member rearwardly upon rearward movement of the plunger, said positive means and said resilient means being arranged in opposition to each other to provide energization of said resilient means by said positive means, said positive means and resilient means including lever means arranged to provide for movement of said engaging member less than the movement of said plunger whereby the ejecting motion of the push-out device is less than the withdrawing motion of the punch from the die, said positive means being arranged outwardly of the said die to provide for movement of said engaging member independently of the line of force from said punch through said die whereby resistance to said punch in said die by said engaging member is minimized.

14. In a press having a frame, a reciprocable plunger, a reciprocable push-out device carried by the frame for ejecting stampings, the combination of an engaging member adapted to engage said push-out device and to move said pushout device in one direction, positive means arranged to be driven by said plunger for moving 15 said-engaging member in an opposite direction upon forward movement of said plunger, resilient means arranged for moving said engaging member in said one direction upon rearward move ment of said plunger, said positive means and said resilient means being arranged in opposition to each other to provide energization of said resilient means by said positive means, and motion-dividing means operatively connecting said engaging member and said resilient means and arranged to provide for movement of the engaging member by the resilient means less than the movement of the resilient means in reaction to said positive means, the line of force through said positive means from said plunger to said engaging member being displaced from the line of force of said plunger.

15. A mechanism for operating a push-out device for ejecting stampings from the die mounted on a punch press, said press having a ram and a frame, said ram being reciprocal to advance toward, and to withdraw from, said die and said push-out device being reciprocal to retract and to extend relative to said die, said mechanism comprising, in combination, resilient means carried by said press, first operating means operatively connected to said ram and to said resilient means and arranged for energizing said resilient means uponadvanoing movement-of said ram toward said die and-providing resilient resistance to said advancing movement of said ram by said resilient means, and second operating means operatively connecting said resilient means and said push-out device and arranged to recurrently extend said push-out device upon release of said energy by said resilient means, said operating means including proportioning means for propcrtioning the movement of'said push-out device relative to, and less than, the movement of said ram.

WALTER S. SUTOWSKI.

REFERENCES CITED The following references are of record in the file of this-patent: V

UNITED STATES PATENTS Number Name Date 247,465 Long Sept. 20, 1831 465,840 Dewes et a1. Dec. 29, 1891 1,615,623 Grifiiths Jan. 25, 1927 FOREIGN PATENTS Number Country Date 8,773 Great Britain -s of 1899 

